Cash register



Feb. 28, 1939. T. o. R DAHLBERG CASH REGISTER Filed sept. 50, 1957 Tora (nog Rckurd Bamberg \Nv&NTore (L1 mm VKALQATT@ Patented Feb. 28,-1939` cAsH REGISTERk Tord Olof Rickard Dahlberg, Nockeby, Sweden, v assignor to Kooperative. Forbundet, Forening u. p. a., Stockholm, Sweden Application September 30, 1937, Serial No. 166,556 In Sweden October 2, y1936 A4 Claims.

The present invention relates to a device in cash registers of the kind, in which a strip of paper, by means of a feed roll, is adapted, when being; fed, to be unwound from one roll and be Wound up on another roll, and, when being fedv between a swingable printing hammer and a" type wheel, when the printing hammer is swung in one direction, to be provided with printing. In such cash registers it'has always been difficult, after the strip of paper having been fully printed orfully stamped, to replace the same by a new strip, because in such a case it is necessary to detach and, respectively, insert the wind-up and wind-off rolls directly from and in the machine, respectively. During this time it has not been possible, either, to use the register. The chief object of the present invention is now to overcome the said drawback, due to which the rolls receiving the strip of paper as well'as the feed roll in the device according tothe invention yare provided `on a plate or the like, which'serves as a supporting member for the abovementioned rolls and which is provided with guide sleeves or the like extending in a plane, about perpendicular to the plane of the plate, and which are adapted to be pushed over pins or the like rigidly connected with the fra-me of the cash register. On account hereof it will thus be possible, by removing the supporting plate, with a simple manual operation to take outl all rolls and, if there is ready an already prepared supporting plate with rolls, by just as simple a manual operation quickly to insert a new strip of paper.

An embodiment of the invention is illustrated in the accompanying drawing, in which Figures 1 and 2 show the device when viewed from two sides, perpendicular to each other.

Referring to the drawing a indicates the strip of paper and b the ink ribbon, which ribbon, by means of a feed mechanism, only roughly shown in the drawing, may be given a stepwise feed movement. Numeral I indicates the feed roll for the paper strip, the superficies of the said roll being grooved, and 2, 3 indicate the wind off and wind up rolls, respectively, the latter being in driving connection with each other by means of an endless screw drawspring 21. The paper strip is meant to be fed, in the direction indicated by arrows in the drawing, between a swingable printing hammer 4 and a shiftable type wheel 5. 32 indicates guide pins for guiding the paper strip. The printing hammer 4, by means of a spring 34, tends to be pressed against the type wheel 5, but a cam disc, an arm or the like, which is not shown in the drawing and which is adaptedfto cooperate with one arm 24 of the type hammer, tends, when printing shall not take place, to press the lastmentioned arm in the direction indicated by an arrow, so that the printing hammer will assume its position shown in the drawing.

' According to the invention the rolls I, 2 and 3 are rprovided on a yplate 6, which is equipped with guide sleeves 1, 8. The latter extend in a plane, which is about perpendicular to the plane of the plate, and are adapted to be pushed over pins 9, I0 (Figure 2) rigidly united with the frame I I of the register; By means of locking members provided on a cover plate, not shown in the drawing, and adapted to cooperate with the pins 9, I0, the plate 6 is lockable in its inserted terminal position. In order that the feed roll I in the device according to the invention shall be given a stepwise rotation in the direction indicated by an arrow there is swingably provided on the shaft I2 of the said roll a two armed lever, one arm of which I3 carries a spring-actuated, swingable hook I5, which is adapted to cooperate with teeth I4 on the feed roll in such a manner that when the arm I3 is swung in the indicated arrow direction it takes the feed roll along. The other arm I6 of the said lever, on the other hand, is providedwith a recess 25, into which extends a pin 26 secured to the printing hammer. Thus, during the relatively slow swinging of the printing hammer from its operative printing position into its inoperative position or rest position there is a turning of the feed roll and a feed of the paper strip.

In order to prevent the paper strip a from sliding when the feed roll I is rotated there is, on the supporting plate 6, by means of a pin 28, swingably mounted a two-armed lever, one arm I'I of which carries a roll I8, preferably made of caoutchouc, a screw drawspring 29 being united with the other arm I9 of said lever, the said screw drawspring holding the roll I8 yieldingly pressed against the paper strip passing over the feed roll I. To facilitate the insertion of the paper strip between the lastmentioned rolls the arm I9 is provided with a pin 30, serving as a finger grip, by means of which the said arm can be swung in the direction indicated by an arrow. During such operation the roll I8 is brought out of contact with the feed roll I and a swingable spring-actuated arm 20, which is provided with a recess 3|, is automatically brought into blocking position and blocks the arm I9 in its swung-out position,during which operation the pin 33, which serves as a member of attachment for one end of 55 the spring 29, rests against the recess 3|. Without diculty the paper strip a may now be inserted between the rolls I' and I8 and after this having been done the arm I9 is released, the roll I8 being returned to the initial position by the spring 29.

In order to facilitate the application of the plate 6 in the machine or apparatus, the feed roll I is provided with an axial extended portion- 22 having a finger grip 2| and, moreover, there is a pawl 23 cooperating with the teeth I4 and preventing rotation of the roll I in a direction opposite to the direction of feed. Thus, it is impossible to rotate the feed roll I in more directions than one. Therefore, when applying the plate 6 in the apparatus it is necessary only to turn the finger grip 2l to a little extent, by which, on one hand, the paper strip is stretched, and, on the other hand the arm I6 is taken along, on account of the friction between the teeth I4 and the feed hook I 5, to its initial position shown in the drawing. When, therefore, the guide sleeves 1, 8 of the plate 6 are pushed over the pins 9, I0 and the printing hammer 4 assumes its position shown in the drawing, the recess 25 assumes a position responding to the pin 26.

As is clear from the above it is thereforeI4 possible, quickly and with a simple manual opera-A tion, to remove from the apparatus the plate 6 with its fully printed paper strip and to insert another plate 6 provided with a new paper strip. Moreover, the advantage is obtained of all the parts required for feeding the paper strip, except the two lever arms I3, I6, being independent of the other movable parts of the apparatus and not, as has heretofore been the case, taking part more or less in the movements', which complicates the construction and, moreover, causes a certain and unnecessary resistance when operating the machine. Further, as is clear from the above, it has been well provided for the quick and easy removal and also the application of the paper strip a.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a cash register having a machine frame and permanently mounted on said frame, a swingable printing hammer, a type Wheel, and an inking mechanism, the combination with a carrier plate and means to detachably secure said carrier plate in a denite position nsa-id frame, of a paper tape feeding device mounted on said plate and comprising Winding and unwinding spools for the tape, a feed roller, means for guiding the tape between said printing hammer and type wheel, a pawl and ratchet mechanism to stepwise rotate said feed roller, and actuating means for said paWl and ratchet mechanism, said actuating means being operatively connected to said printing hammer when said carrier plate and paper tape feeding device are in place on said frame.

2. A device, as claimed in claim l, in which said means for securing said' plate to said frame comprises a plurality ofy guide pins ,and corresponding guide sleeves mounted onsaid plate and frame, respectively, and projecting at right angles to the plane of the plate. Y n

3. A device, as claimed' in claii 1, in which said printing hanirner carries onv its free endr a pin and said actuating means consists of a twoarmed lever carrying on one arn'i the driving pawl' for saidA feed roller, the second arm being provided with a slot to be engaged byl said pin on said printing hammer. n

4. A device, as claimed in'claim 1', in which said feed roller provided n one handwith an axial extended position formed as afinger' grip' and on the other hand with a blocking device preventing rotation of therller in a direction opposite to' the direction of feed.

from)y onor` RicrflianDAHV LB` ZERGL 

